USB daughterboard schematic from the Lepus project with the ZHX tag, a RAMP-stage release, a small 345 KB PDF. It belongs with the matching main board and LED board drawings of the same set, and covers only the USB sub-board circuit. That includes port connectors, power switching or current limiting and the interconnect to the mainboard. Use it to check why a port has no 5 V, trace data lines back to the cable connector or find a shorted protection part. The name gives no brand, so confirm the board code before relying on it.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @afsschematicfree. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.